Weather in Greater Sudbury in August

A good month. August works. It is not the peak, but nothing about it fights you. Highs average 24.5 °C, lows 13 °C, and rain falls on 13 days — nothing in the month is working against you.

August ranks 3 of 12 in Greater Sudbury. Only July scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 13 days, 2 of them heavy. Enough to need a plan B, not enough to need a plan around it. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest August day reached 34 °C and the coldest night fell to 4.2 °C, and the wettest single day dropped 35 mm — roughly 43% of the month's rain in one day.

August is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest August on record still delivered 142 mm against 42 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 81 mm average is a reasonable planning figure, not a promise.

Wind is light at 2 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 74%.

How August sits in the year

Temperatures hold steady either side: 25.1 °C in July, 24.5 here, 20.5 in September. Nothing about the timing within the month matters much.

Daylight in August

14.3 hours of daylight, losing 1.4 hours across the month. That is between Greater Sudbury's extremes of 15.8 and 8.6 hours, so days are long enough not to constrain the plan.

An inland climate

Greater Sudbury has no sea to moderate it, and it shows: 43.2 °C separates the hottest afternoon of the year from the coldest night. That is a genuinely continental range, and it means summer and winter here are barely the same place.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

August in Greater Sudbury versus nearby

If Greater Sudbury is one option among several, the nearby comparison is worth making. Barrie is close enough to be a coin toss — within a degree on temperature, 3 days less rain. Peterborough is close enough to be a coin toss — 3.2 °C warmer, 2 days less rain.

So: August is effectively as good as it gets here — 2 points behind July, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Greater Sudbury

See all twelve months in Greater Sudbury, or where else to go in August.